Decision Review System to change for winter Ashes series

The decision review system (DRS) used in Tests will be changed to allow an extra two referrals per team in this winter's Ashes series.

An International Cricket Council trial will start from 1 October allowing reviews in Test matches using DRS to be topped up after 80 overs of an innings.

At the moment teams are allowed two unsuccessful reviews per innings.

DRS was criticised during this summer's England v Australia series after a string of controversial decisions.

What are Snicko and Hot Spot?

Snicko uses soundwaves to try to detect if the batsman has edged a ball, while Hot Spot uses thermal imaging cameras. While there have been instances where a faint edge has not shown up on Hot Spot, it is hoped the two could work together to create a better decision review system.

In some of these instances Snickometer might have helped, but it is not currently part of DRS because it takes too long to return a result.

The ICC also suggested extra training for television umpires and announced its intention to clamp down on slow over-rates and time wasting and to "maximise playing time in conditions where is it safe to do so".

Chasing 227, England were 21 runs short of their target with four overs remaining but the umpires deemed the conditions too dangerous to play in.

It is believed Australia and England could reach their own agreement over what conditions they would play in during this winter's Ashes series.

Agnew said: "All the grounds have excellent floodlights, if the lights are on you play. Some fielding teams will chunter, of course.

"I have seen matches where fielding in those circumstances is difficult but it is the same for both sides and you cannot possibly have a situation again where with four overs to go and a finish building up the umpires take the players off."

The first Test of this series in Australia starts on 21 November in Brisbane.